1 /*
2 * Copyright (c) 2001-2003
3 * Fraunhofer Institute for Open Communication Systems (FhG Fokus).
4 * All rights reserved.
5 *
6 * Author: Harti Brandt <harti@freebsd.org>
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $Begemot: bsnmp/snmp_mibII/mibII_interfaces.c,v 1.17 2006/02/14 09:04:19 brandt_h Exp $
30 *
31 * Interfaces group.
32 */
33 #include "mibII.h"
34 #include "mibII_oid.h"
35
36 /*
37 * This structure catches all changes to a interface entry
38 */
39 struct ifchange {
40 struct snmp_dependency dep;
41
42 u_int ifindex;
43
44 uint32_t set;
45 int promisc;
46 int admin;
47 int traps;
48
49 uint32_t rb;
50 int rb_flags;
51 int rb_traps;
52 };
53 #define IFC_PROMISC 0x0001
54 #define IFC_ADMIN 0x0002
55 #define IFC_TRAPS 0x0004
56 #define IFRB_FLAGS 0x0001
57 #define IFRB_TRAPS 0x0002
58
59 static const struct asn_oid
60 oid_ifTable = OIDX_ifTable;
61
62 /*
63 * This function handles all changes to the interface table and interface
64 * extension table.
65 */
66 static int
ifchange_func(struct snmp_context * ctx __unused,struct snmp_dependency * dep,enum snmp_depop op)67 ifchange_func(struct snmp_context *ctx __unused, struct snmp_dependency *dep,
68 enum snmp_depop op)
69 {
70 struct ifchange *ifc = (struct ifchange *)dep;
71 struct mibif *ifp;
72 struct ifreq ifr, ifr1;
73
74 if ((ifp = mib_find_if(ifc->ifindex)) == NULL)
75 return (SNMP_ERR_NO_CREATION);
76
77 switch (op) {
78
79 case SNMP_DEPOP_COMMIT:
80 strlcpy(ifr.ifr_name, ifp->name, sizeof(ifr.ifr_name));
81 if (ioctl(mib_netsock, SIOCGIFFLAGS, &ifr) == -1) {
82 syslog(LOG_ERR, "GIFFLAGS(%s): %m", ifp->name);
83 return (SNMP_ERR_GENERR);
84 }
85 if (ifc->set & IFC_PROMISC) {
86 ifr.ifr_flags &= ~IFF_PROMISC;
87 if (ifc->promisc)
88 ifr.ifr_flags |= IFF_PROMISC;
89 ifc->rb |= IFRB_FLAGS;
90 }
91 if (ifc->set & IFC_ADMIN) {
92 ifr.ifr_flags &= ~IFF_UP;
93 if (ifc->admin)
94 ifr.ifr_flags |= IFF_UP;
95 ifc->rb |= IFRB_FLAGS;
96 }
97 if (ifc->rb & IFRB_FLAGS) {
98 strlcpy(ifr1.ifr_name, ifp->name, sizeof(ifr1.ifr_name));
99 if (ioctl(mib_netsock, SIOCGIFFLAGS, &ifr1) == -1) {
100 syslog(LOG_ERR, "GIFFLAGS(%s): %m", ifp->name);
101 return (SNMP_ERR_GENERR);
102 }
103 ifc->rb_flags = ifr1.ifr_flags;
104 if (ioctl(mib_netsock, SIOCSIFFLAGS, &ifr) == -1) {
105 syslog(LOG_ERR, "SIFFLAGS(%s): %m", ifp->name);
106 return (SNMP_ERR_GENERR);
107 }
108 (void)mib_fetch_ifmib(ifp);
109 }
110 if (ifc->set & IFC_TRAPS) {
111 ifc->rb |= IFRB_TRAPS;
112 ifc->rb_traps = ifp->trap_enable;
113 ifp->trap_enable = ifc->traps;
114 }
115 return (SNMP_ERR_NOERROR);
116
117 case SNMP_DEPOP_ROLLBACK:
118 if (ifc->rb & IFRB_FLAGS) {
119 strlcpy(ifr.ifr_name, ifp->name, sizeof(ifr.ifr_name));
120 ifr.ifr_flags = ifc->rb_flags;
121 if (ioctl(mib_netsock, SIOCSIFFLAGS, &ifr) == -1) {
122 syslog(LOG_ERR, "SIFFLAGS(%s): %m", ifp->name);
123 return (SNMP_ERR_UNDO_FAILED);
124 }
125 (void)mib_fetch_ifmib(ifp);
126 }
127 if (ifc->rb & IFRB_TRAPS)
128 ifp->trap_enable = ifc->rb_traps;
129 return (SNMP_ERR_NOERROR);
130
131 case SNMP_DEPOP_FINISH:
132 return (SNMP_ERR_NOERROR);
133
134 }
135 abort();
136 }
137
138 /*
139 * Return difference to daemon start time in ticks truncated to a
140 * 32-bit value. If the timeval is 0 then return 0.
141 */
142 static uint32_t
ticks_get_timeval(struct timeval * tv)143 ticks_get_timeval(struct timeval *tv)
144 {
145 uint64_t v;
146
147 if (tv->tv_sec != 0 || tv->tv_usec != 0) {
148 v = 100ULL * tv->tv_sec + tv->tv_usec / 10000ULL;
149 if (v > start_tick)
150 return (v - start_tick);
151 }
152 return (0);
153 }
154
155 /*
156 * Scalars
157 */
158 int
op_interfaces(struct snmp_context * ctx __unused,struct snmp_value * value,u_int sub,u_int idx __unused,enum snmp_op op)159 op_interfaces(struct snmp_context *ctx __unused, struct snmp_value *value,
160 u_int sub, u_int idx __unused, enum snmp_op op)
161 {
162 switch (op) {
163
164 case SNMP_OP_GETNEXT:
165 abort();
166
167 case SNMP_OP_GET:
168 break;
169
170 case SNMP_OP_SET:
171 return (SNMP_ERR_NOT_WRITEABLE);
172
173 case SNMP_OP_ROLLBACK:
174 case SNMP_OP_COMMIT:
175 abort();
176 }
177
178 switch (value->var.subs[sub - 1]) {
179
180 case LEAF_ifNumber:
181 value->v.integer = mib_if_number;
182 break;
183 }
184 return (SNMP_ERR_NOERROR);
185 }
186
187 /*
188 * Iftable entry
189 */
190 int
op_ifentry(struct snmp_context * ctx,struct snmp_value * value,u_int sub,u_int iidx __unused,enum snmp_op op)191 op_ifentry(struct snmp_context *ctx, struct snmp_value *value,
192 u_int sub, u_int iidx __unused, enum snmp_op op)
193 {
194 struct mibif *ifp = NULL;
195 int ret;
196 struct ifchange *ifc;
197 struct asn_oid idx;
198
199 switch (op) {
200
201 case SNMP_OP_GETNEXT:
202 if ((ifp = NEXT_OBJECT_INT(&mibif_list, &value->var, sub)) == NULL)
203 return (SNMP_ERR_NOSUCHNAME);
204 value->var.len = sub + 1;
205 value->var.subs[sub] = ifp->index;
206 break;
207
208 case SNMP_OP_GET:
209 if (value->var.len - sub != 1)
210 return (SNMP_ERR_NOSUCHNAME);
211 if ((ifp = mib_find_if(value->var.subs[sub])) == NULL)
212 return (SNMP_ERR_NOSUCHNAME);
213 break;
214
215 case SNMP_OP_SET:
216 if (value->var.len - sub != 1)
217 return (SNMP_ERR_NO_CREATION);
218 if ((ifp = mib_find_if(value->var.subs[sub])) == NULL)
219 return (SNMP_ERR_NO_CREATION);
220 if (value->var.subs[sub - 1] != LEAF_ifAdminStatus)
221 return (SNMP_ERR_NOT_WRITEABLE);
222
223 idx.len = 1;
224 idx.subs[0] = ifp->index;
225
226 if (value->v.integer != 1 && value->v.integer != 2)
227 return (SNMP_ERR_WRONG_VALUE);
228
229 if ((ifc = (struct ifchange *)snmp_dep_lookup(ctx,
230 &oid_ifTable, &idx, sizeof(*ifc), ifchange_func)) == NULL)
231 return (SNMP_ERR_RES_UNAVAIL);
232 ifc->ifindex = ifp->index;
233
234 if (ifc->set & IFC_ADMIN)
235 return (SNMP_ERR_INCONS_VALUE);
236 ifc->set |= IFC_ADMIN;
237 ifc->admin = (value->v.integer == 1) ? 1 : 0;
238
239 return (SNMP_ERR_NOERROR);
240
241 case SNMP_OP_ROLLBACK:
242 case SNMP_OP_COMMIT:
243 return (SNMP_ERR_NOERROR);
244 }
245
246 if (ifp->mibtick < this_tick)
247 (void)mib_fetch_ifmib(ifp);
248
249 ret = SNMP_ERR_NOERROR;
250 switch (value->var.subs[sub - 1]) {
251
252 case LEAF_ifIndex:
253 value->v.integer = ifp->index;
254 break;
255
256 case LEAF_ifDescr:
257 ret = string_get(value, ifp->descr, -1);
258 break;
259
260 case LEAF_ifType:
261 value->v.integer = ifp->mib.ifmd_data.ifi_type;
262 break;
263
264 case LEAF_ifMtu:
265 value->v.integer = ifp->mib.ifmd_data.ifi_mtu;
266 break;
267
268 case LEAF_ifSpeed:
269 value->v.integer = ifp->mib.ifmd_data.ifi_baudrate;
270 break;
271
272 case LEAF_ifPhysAddress:
273 ret = string_get(value, ifp->physaddr,
274 ifp->physaddrlen);
275 break;
276
277 case LEAF_ifAdminStatus:
278 value->v.integer =
279 (ifp->mib.ifmd_flags & IFF_UP) ? 1 : 2;
280 break;
281
282 case LEAF_ifOperStatus:
283 /*
284 * According to RFC 2863 the state should be Up if the
285 * interface is ready to transmit packets. We takes this to
286 * mean that the interface should be running and should have
287 * a carrier. If it is running and has no carrier we interpret
288 * this as 'waiting for an external event' (plugging in the
289 * cable) and hence return 'dormant'.
290 */
291 if (ifp->mib.ifmd_flags & IFF_RUNNING) {
292 if (ifp->mib.ifmd_data.ifi_link_state != LINK_STATE_UP)
293 value->v.integer = 5; /* state dormant */
294 else
295 value->v.integer = 1; /* state up */
296 } else
297 value->v.integer = 2; /* state down */
298 break;
299
300 case LEAF_ifLastChange:
301 value->v.uint32 =
302 ticks_get_timeval(&ifp->mib.ifmd_data.ifi_lastchange);
303 break;
304
305 case LEAF_ifInOctets:
306 value->v.uint32 = ifp->mib.ifmd_data.ifi_ibytes;
307 break;
308
309 case LEAF_ifInUcastPkts:
310 value->v.uint32 = ifp->mib.ifmd_data.ifi_ipackets -
311 ifp->mib.ifmd_data.ifi_imcasts;
312 break;
313
314 case LEAF_ifInNUcastPkts:
315 value->v.uint32 = ifp->mib.ifmd_data.ifi_imcasts;
316 break;
317
318 case LEAF_ifInDiscards:
319 value->v.uint32 = ifp->mib.ifmd_data.ifi_iqdrops;
320 break;
321
322 case LEAF_ifInErrors:
323 value->v.uint32 = ifp->mib.ifmd_data.ifi_ierrors;
324 break;
325
326 case LEAF_ifInUnknownProtos:
327 value->v.uint32 = ifp->mib.ifmd_data.ifi_noproto;
328 break;
329
330 case LEAF_ifOutOctets:
331 value->v.uint32 = ifp->mib.ifmd_data.ifi_obytes;
332 break;
333
334 case LEAF_ifOutUcastPkts:
335 value->v.uint32 = ifp->mib.ifmd_data.ifi_opackets -
336 ifp->mib.ifmd_data.ifi_omcasts;
337 break;
338
339 case LEAF_ifOutNUcastPkts:
340 value->v.uint32 = ifp->mib.ifmd_data.ifi_omcasts;
341 break;
342
343 case LEAF_ifOutDiscards:
344 value->v.uint32 = ifp->mib.ifmd_snd_drops;
345 break;
346
347 case LEAF_ifOutErrors:
348 value->v.uint32 = ifp->mib.ifmd_data.ifi_oerrors;
349 break;
350
351 case LEAF_ifOutQLen:
352 value->v.uint32 = ifp->mib.ifmd_snd_len;
353 break;
354
355 case LEAF_ifSpecific:
356 value->v.oid = ifp->spec_oid;
357 break;
358 }
359 return (ret);
360 }
361
362 /*
363 * IfXtable entry
364 */
365 int
op_ifxtable(struct snmp_context * ctx,struct snmp_value * value,u_int sub,u_int iidx __unused,enum snmp_op op)366 op_ifxtable(struct snmp_context *ctx, struct snmp_value *value,
367 u_int sub, u_int iidx __unused, enum snmp_op op)
368 {
369 struct mibif *ifp = NULL;
370 int ret;
371 struct ifchange *ifc;
372 struct asn_oid idx;
373
374 switch (op) {
375
376 case SNMP_OP_GETNEXT:
377 if ((ifp = NEXT_OBJECT_INT(&mibif_list, &value->var, sub)) == NULL)
378 return (SNMP_ERR_NOSUCHNAME);
379 value->var.len = sub + 1;
380 value->var.subs[sub] = ifp->index;
381 break;
382
383 case SNMP_OP_GET:
384 if (value->var.len - sub != 1)
385 return (SNMP_ERR_NOSUCHNAME);
386 if ((ifp = mib_find_if(value->var.subs[sub])) == NULL)
387 return (SNMP_ERR_NOSUCHNAME);
388 break;
389
390 case SNMP_OP_SET:
391 if (value->var.len - sub != 1)
392 return (SNMP_ERR_NO_CREATION);
393 if ((ifp = mib_find_if(value->var.subs[sub])) == NULL)
394 return (SNMP_ERR_NO_CREATION);
395
396 idx.len = 1;
397 idx.subs[0] = ifp->index;
398
399 if ((ifc = (struct ifchange *)snmp_dep_lookup(ctx,
400 &oid_ifTable, &idx, sizeof(*ifc), ifchange_func)) == NULL)
401 return (SNMP_ERR_RES_UNAVAIL);
402 ifc->ifindex = ifp->index;
403
404 switch (value->var.subs[sub - 1]) {
405
406 case LEAF_ifLinkUpDownTrapEnable:
407 if (value->v.integer != 1 && value->v.integer != 2)
408 return (SNMP_ERR_WRONG_VALUE);
409 if (ifc->set & IFC_TRAPS)
410 return (SNMP_ERR_INCONS_VALUE);
411 ifc->set |= IFC_TRAPS;
412 ifc->traps = (value->v.integer == 1) ? 1 : 0;
413 return (SNMP_ERR_NOERROR);
414
415 case LEAF_ifPromiscuousMode:
416 if (value->v.integer != 1 && value->v.integer != 2)
417 return (SNMP_ERR_WRONG_VALUE);
418 if (ifc->set & IFC_PROMISC)
419 return (SNMP_ERR_INCONS_VALUE);
420 ifc->set |= IFC_PROMISC;
421 ifc->promisc = (value->v.integer == 1) ? 1 : 0;
422 return (SNMP_ERR_NOERROR);
423 }
424 return (SNMP_ERR_NOT_WRITEABLE);
425
426 case SNMP_OP_ROLLBACK:
427 case SNMP_OP_COMMIT:
428 return (SNMP_ERR_NOERROR);
429 }
430
431 if (ifp->mibtick < this_tick)
432 (void)mib_fetch_ifmib(ifp);
433
434 ret = SNMP_ERR_NOERROR;
435 switch (value->var.subs[sub - 1]) {
436
437 case LEAF_ifName:
438 ret = string_get(value, ifp->name, -1);
439 break;
440
441 case LEAF_ifInMulticastPkts:
442 value->v.uint32 = ifp->mib.ifmd_data.ifi_imcasts;
443 break;
444
445 case LEAF_ifInBroadcastPkts:
446 value->v.uint32 = 0;
447 break;
448
449 case LEAF_ifOutMulticastPkts:
450 value->v.uint32 = ifp->mib.ifmd_data.ifi_omcasts;
451 break;
452
453 case LEAF_ifOutBroadcastPkts:
454 value->v.uint32 = 0;
455 break;
456
457 case LEAF_ifHCInOctets:
458 value->v.counter64 = MIBIF_PRIV(ifp)->hc_inoctets;
459 break;
460
461 case LEAF_ifHCInUcastPkts:
462 value->v.counter64 = MIBIF_PRIV(ifp)->hc_ipackets -
463 MIBIF_PRIV(ifp)->hc_imcasts;
464 break;
465
466 case LEAF_ifHCInMulticastPkts:
467 value->v.counter64 = MIBIF_PRIV(ifp)->hc_imcasts;
468 break;
469
470 case LEAF_ifHCInBroadcastPkts:
471 value->v.counter64 = 0;
472 break;
473
474 case LEAF_ifHCOutOctets:
475 value->v.counter64 = MIBIF_PRIV(ifp)->hc_outoctets;
476 break;
477
478 case LEAF_ifHCOutUcastPkts:
479 value->v.counter64 = MIBIF_PRIV(ifp)->hc_opackets -
480 MIBIF_PRIV(ifp)->hc_omcasts;
481 break;
482
483 case LEAF_ifHCOutMulticastPkts:
484 value->v.counter64 = MIBIF_PRIV(ifp)->hc_omcasts;
485 break;
486
487 case LEAF_ifHCOutBroadcastPkts:
488 value->v.counter64 = 0;
489 break;
490
491 case LEAF_ifLinkUpDownTrapEnable:
492 value->v.integer = ifp->trap_enable ? 1 : 2;
493 break;
494
495 case LEAF_ifHighSpeed:
496 value->v.integer =
497 (ifp->mib.ifmd_data.ifi_baudrate + 499999) / 1000000;
498 break;
499
500 case LEAF_ifPromiscuousMode:
501 value->v.integer =
502 (ifp->mib.ifmd_flags & IFF_PROMISC) ? 1 : 2;
503 break;
504
505 case LEAF_ifConnectorPresent:
506 value->v.integer = ifp->has_connector ? 1 : 2;
507 break;
508
509 case LEAF_ifAlias:
510 ret = string_get(value, ifp->alias, ifp->alias_size - 1);
511 break;
512
513 case LEAF_ifCounterDiscontinuityTime:
514 if (ifp->counter_disc > start_tick)
515 value->v.uint32 = ifp->counter_disc - start_tick;
516 else
517 value->v.uint32 = 0;
518 break;
519 }
520 return (ret);
521 }
522